Network Engineer

Leidos Enterprise Civil Div. in support of the Department of Homeland Security (DHS) is looking for talent in the networking field to work out of Lorton, Virginia as a Network Engineer. In FY23 Leidos was awarded the Homeland Enterprise Information Technology Secure Services and Support (HEITS) follow-on contract to support and enhance the DHS networks, Homeland Secure Data Network (HSDN) and the Classified-Local Area Network (C-LAN).

Leidos Enterprise Civil Div. in support of the Department of Homeland Security (DHS) is looking for talent in the networking field to work out of Lorton, Virginia as a Network Engineer. In FY23 Leidos was awarded the Homeland Enterprise Information Technology Secure Services and Support (HEITS) follow-on contract to support and enhance the DHS networks, Homeland Secure Data Network (HSDN) and the Classified-Local Area Network (C-LAN). Leidos is a Fortune 500 science and technology leader with a competitive benefits package, including a Roth 401k with company matching and stock driven investment options.

The successful candidate will be responsible for managing end-to-end network installation and configuration activities, ensuring successful deployment, and maintaining high network quality standards. This role requires a deep technical understanding of networking technologies, strong leadership abilities, and effective project management skills on both classified and unclassified networks. You will work closely with cross-functional teams, including software developers, system administrators, and various engineers, to oversee the deployment of customer network infrastructure projects.

The right candidate will possess the following skills and qualifications and be ready to handle all responsibilities independently and professionally.

Responsibilities

Lead and manage the deployment of network solutions across various geographic locations, ensuring projects are delivered on time, within scope, and within budget.

Oversee the installation, configuration, and testing of network hardware and software, including routers, switches, and firewalls.

Coordinate with cross-functional teams (engineering, deployment, IA) to ensure smooth deployment and integration of network systems.

Ensure adherence to network design and security best practices, including implementation of redundancies, scalability, and fault‑tolerant solutions.

Create detailed project plans, manage timelines, track progress, and address any issues that arise during the deployment lifecycle.

Design, engineer, and implement local area networks (LANs), wide area networks (WANs), Data Center networks, and other network‑related technologies.

Perform network configuration and troubleshooting to ensure optimal performance and security.

Collaborates with cross‑functional teams to integrate network solutions for new and existing systems.

Conduct thorough risk assessments and implement mitigation strategies.

Maintain thorough documentation of network deployment processes, configurations, and troubleshooting logs.

Perform site surveys to assess site readiness and determine deployment needs.

Provide technical leadership and mentorship to junior engineers and deployment staff.

Collaborate with network architects to ensure designs are aligned with deployment requirements.

Troubleshoot and resolve any network issues that arise during deployment and post‑deployment phases.

Ensure compliance with industry standards and regulatory requirements.

Conduct regular maintenance and firmware upgrades on critical network infrastructure.

Create required engineering documentation for network related projects.

Provide on‑call support and response for critical system emergencies, as required

Qualifications

Clearance Required: Active TS/SCI

Degree and Years of Experience: Bachelor's degree in technology related field with 8+ years of experience with Network Engineering in an enterprise environment (or equivalent experience).

Required Skills

Design, deploy, and maintain Cisco ISE solutions for classified enterprise‑scale environments.

Configure and optimize 802.1X authentication for wired networks.

Integrate ISE with Active Directory, PKI, and other identity sources for centralized policy management.

Implement and manage MAC Authentication Bypass (MAB) for non‑802.1X capable devices.

Develop and maintain network access policies, VLAN assignments, and posture assessments.

Troubleshoot authentication issues using tools like Wireshark, Splunk and ISE logs.

Collaborate with network, security, and endpoint teams to ensure smooth rollouts and minimal user disruption.

Document configurations, processes, and best practices for operational handover

Solid experience with routing and switching technologies (e.g., Cisco, Juniper).

In‑depth knowledge of L2/L3 network protocols/technologies (TCP/IP, iBGP, eBGP, OSPF, VLANs, 802.1q, LAG, etc.) and network security best practices.

Experience with network management tools and network monitoring systems.

Proven leadership skills and experience managing cross‑functional teams or projects.

Strong problem‑solving and analytical skills with a proactive approach to addressing network deployment challenges.

Excellent communication skills, both written and verbal, and the ability to interact with stakeholders at all levels.

Desired Skills

Experience supporting classified networks

Experience in ensuring Service Level Agreement (SLA) compliance

Support to DHS Programs Knowledge/Experience

COMSEC

Solar Winds

Network Automation

Desired Certifications

IAT Level II baseline certification as defined by DoD 8570.01 (Security +)

Cisco and/or Juniper certifications

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting

August 7, 2026

Pay Range

Pay Range $92,300.00 - $166,850.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Pay And Benefits

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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